System for monitoring injected fuel quantities
A fuel system has a source of fuel coupled to a plurality of fuel injectors via a fuel rail. The system is operable to estimate a quantity of fuel injected into an internal combustion engine by disabling fuel flow from the source of fuel to the fuel rail, and monitoring a fuel request corresponding...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
31.08.2010
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| Online Access | Get full text |
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| Summary: | A fuel system has a source of fuel coupled to a plurality of fuel injectors via a fuel rail. The system is operable to estimate a quantity of fuel injected into an internal combustion engine by disabling fuel flow from the source of fuel to the fuel rail, and monitoring a fuel request corresponding to a request for delivery of fuel by the fuel system to the engine produced by the engine. If the fuel request is below a threshold fueling level a selected fuel injector is controlled to inject a selected quantity of fuel from the fuel rail into the engine while inhibiting fuel injection the remaining fuel injectors, fuel rail pressure is sampled, a drop in the fuel rail pressure, resulting from injection of the selected quantity of fuel, is determined from the fuel rail pressure samples, and the quantity of fuel injected by the selected injector is determined as a function of the drop in fuel rail pressure. |
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